Add EasyPost to company list (#25)

Author: nwithan8

common/status_pages/status_pages.go

@@ -360,6 +360,9 @@ var StatusPages = []api.StatusPage{
 	}, {
 		URL:  "https://dynatrace.status.io",
 		Name: "dynatrace",
+	}, {
+		URL: "https://www.easypoststatus.com",
+		Name: "easypost"
 	}, {
 		URL:  "https://status.ecostruxureit.com",
 		Name: "ecostruxure-it",